6mm barbed fitting made ​​from nickel-coated brass with O-ring seal for 8mm PVC, PU, PA, silicone or PE hoses with an inner diameter of 7-9mm. G1 / 4 "outer thread. height 35.5 mm, fitting inner diameter 6.6 mm.

Note for watercooling beginners:
The connectors for hoses (7 / 16 ", 3 / 8 ", 1 / 2 ") are provided with measurements in mm in our shop. These can differ by +-1mm, Which is no problem as hose clamps have to be used for installation. If the hose is to be mounted without a clamp chosen, a larger fitting should be. With some fittings that tend to be larger, though it is possible that a hose with an inner diameter of 13mm actually does seal without a hose clamp.
 

Overview:
10mm (3 / 8 ") hose clamp: up to 8mm none, from 10mm up required
10mm (7 / 16 ") hose clamp: up to 8mm none, from 10mm up required
12mm (1 / 2 ") hose clamp: 11mm up to none, from 12mm up required
13mm (1 / 2 ") hose clamp: 11mm up to none, from 13mm up required